I'm assuming this is not your first time connecting to the network in which case you would get a prompt to choose the type of network it is. To adjust the sharing settings connect to the network. In the task bar on the bottom right hand corner click on the network icon (either wifi or ethernet depending on how you are connected). At the bottom of the network menu click on Network Settings. On the left side select Wi-Fi or Ethernet (based on your connection). Click on the network name. Toggle the switch to On for the Find devices and content. This will change the network type to private.